Think of every singles number that you can think of. Then divide every single number that you can think of by every single number you can think of. These will give you all the numbers that can be written as fractions.
In other words, Every single number can be written as a fraction. There are an infinite amount of possibilities.
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The rational numbers are the set of all numbers that can be written as fractions. This set includes the integers as a subset, since every integer can be expressed as being divided by 1; e.g. 10 = 10/1.
Convert all the rational numbers to order into equivalent fractions with the same denominator; then they can be ordered by putting the numerators in order from least to greatest. ------------ You can also convert all the numbers to decimals ... this is actually a special case of "equivalent fractions".
2.7 is rational. Rational numbers are numbers that can be written as a fraction. Irrational Numbers cannot be expressed as a fraction.
All integers and fractions are rational numbers whereas irrational numbers can't be expressed as fractions as for example the square root of 2 can't be expressed as a fraction because it is a non-terminating decimal number.
There are none because they are all rational numbers that can be expressed as fractions as for example 6/1
the set of real numbers